To no one’s surprise, women greatly helped provide Romney with the victory in Michigan. While Romney had only a 1% edge among men in that state, he won the women’s vote by 6%. And this is just among Republican women.
You can see why the Republican party is nervous that in the general election, Santorum’s weird anti-contraception message will cause a massive gender gap if he is the nominee. They have traditionally had problems holding on to this major demographic and Santorum is not helping.
Maybe Santorum will have better luck with his anti-sex message, here provided courtesy of cartoonist Tom Tomorrow. I am sure that will be very popular.